iOptron 6001 사용자 설명서

Having trouble setting up or making it work? Email us at 

900X70@ioptron.com

  We’ll be glad to help!   

11 

 

 

The mount’s R.A. setting circle (16) is scaled in 
hours, from 1 through 24, with small marks in 
between representing 6-minute increments. The 
numbers closest to the R.A. axis gear apply to 
viewing in the Southern Hemisphere, while the 
numbers above them apply to viewing in the 
Northern Hemisphere.  

The Dec. setting circle (13) is scaled in degrees, 
with each mark representing 2° increments. Values 
of Dec. coordinates range from +90° to -90°. The 0° 
mark indicates the celestial equator. When the 
telescope is pointed north of the celestial equator, 
values of the Dec. setting circle are positive, while 
when the telescope is pointed south of the celestial 
equator, values of the Dec. setting circle are 
negative. 

Before you can use the setting circles to locate 
objects, the mount must be correctly polar aligned, 
and the R.A. setting circle must be calibrated. The 
Dec. setting circle has been permanently calibrated 
at the factory, and should read 90° whenever the 
telescope optical tube is parallel with the R.A. axis. 

1. Identify a bright star in the sky near the celestial 
equator (Dec. = 0°) and look up its coordinates in a 
star atlas. 

2. Loosen the R.A. and Dec. lock knobs (14, 12) on 
the equatorial mount, so the telescope optical tube 
can move freely. 

3. Point the telescope at the bright star whose 
coordinates you know. Lock the R.A. and Dec. lock 
knobs. Center the star in the telescope’s field of 
view with the R.A. and Dec control cables. 

4. Rotate the setting circle until the metal arrow 
indicates the R.A. coordinate listed in the star atlas 

for the object 

Now that both setting circles are calibrated, look up 
in a star atlas the coordinates of an object you wish 
to view. Loosen the Dec. lock knob (12) and rotate 
the telescope until the Dec. value from the star 
atlas matches the reading on the Dec. setting circle 
(13). Remember that values of the Dec. setting 
circle are positive when the telescope is pointing 
north of the celestial equator (Dec. = 0°), and 
negative when the telescope is pointing south of 
the celestial equator. Retighten the lock knob. 

Loosen the R.A. lock knob (14) and rotate the 
telescope until the R.A. value from the star atlas 
matches the reading on the R.A. setting circle (16). 
Remember to use the upper set of numbers on the 
R.A. setting circle. Retighten the lock knob. 

Most setting circles are not accurate enough to put 
an object dead-center in the telescope’s eyepiece, 
but they should place the object somewhere within 
the field of view of the finderscope, assuming the 
equatorial mount is accurately polar aligned. Use 
the R.A. and Dec control cables to center the object 
in the finderscope, and it should appear in the 
telescope’s field of view. 

The R.A. setting circle must be re-calibrated every 
time you wish to locate a new object. Do so by 
calibrating the setting circle for the centered object 
before moving on to the next one. 

The power or magnification offered by a telescope 
is determined by two factors: the optical or focal 
length of the telescope's lens and the eyepiece's 
focal length. This telescope's focal length is 900 
mm. To calculate the magnification factor, divide 
the lens' focal length by that of the eyepiece. The 
resulting value represents the magnification factor 
offered by the telescope when it is used with this 
eyepiece. For example, using a 20 mm eyepiece 
provides a magnification factor of: 

Magnification = 900 mm/20 mm = 45X 

Dec. setting circle 

R.A. setting circle 

Dec. mark 

R.A. mark